Speaking on NBC’s “Today” show, Pelosi said she had “never seen behavior this bizarre on the part of the chairman.”

Nunes, the chair of the House Intelligence Committee, has come under fire in recent weeks for communications with the White House that critics have deemed inappropriate.

Nunes last week bypassed committee members to visit the White House and brief Trump on classified intelligence reports that he said showed members of Trump’s transition team had been swept up in incidental surveillance after the 2016 election. Trump used that information to support his unsubstantiated claims from early March that the Obama administration had wiretapped Trump Tower. On Thursday, however, reports surfaced that three White House officials had helped provide the intelligence documents to Nunes.

Pelosi also said that since some of the intelligence about government surveillance under the Obama administration came from the Trump White House, Nunes was possibly being tricked into parroting Trump’s message that he was wiretapped.

“He was duped,” Pelosi said. “That’s the most innocent, most benign characterization, that he was duped, but he should have known better, when you’re the chairman of the committee.”